Common Audible And Auxiliary Ringing Interface; Connecting Outside Lines; Connecting Selected Ports - Comdial G0408 Manual

Digital Telephone System
2.9

Common Audible And Auxiliary Ringing Interface

You can use the relay closure dry-contact points for controlling external audible equipment.
These contact closures track the pattern of the ringing for incoming calls. The contacts are closed
during the ringing period and are open during the silent period.
Do not exceed a 1 amp at 24 volts (0.5 amp at 48 volts) load on these control terminals. If the
load requirements exceed this limit, connect the load through an external slave relay. DO
NOT CONNECT THESE CONTROL TERMINALS DIRECTLY TO THE 117VAC LINE.
2.9.1

Connecting Outside Lines

Common audible terminals provide a dry-contact closure whenever any of the outside lines that
you have connected to the common equipment ring with an incoming call.
2.9.2

Connecting Selected Ports

Station 17 audible terminals provide a dry-contact relay closure whenever ringing is sent to
station 17 or to a programmable destination. Use class of service programming to choose either
the station 17 or the programmable paging port as the ringing destination. Refer to Chapter 3 for
programming details.
When you have programmed for station port 17 ringing, it is a common practice to use a
customer-supplied external device to provide loud ringing and connected in a manner similar to
the common audible arrangement shown in the illustration on the next page.
Do not connect an external paging device or any external ringing device to station port 17
connections.
When you have programmed for paging port ringing, it is a common practice to use a
customer-supplied external paging amplifier connected to the paging port to amplify and
broadcast the ringing tones sent to the paging port by the system. You can employ the relay
closures that appear at the ringing terminals to energize the external paging amplifier during the
periods when the ringing tones are being sent if necessary.
NOTE: Refer to Section 2.10 for a discussion of external paging amplifier connections and
information for using the paging port ringing terminals in an alternate paging enable
function.
2 – 30 Installing The DSU
CAUTION
CAUTION
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